Dry battery.



Y i. KOHETZKY.

DRY BATTERY.

APPLICATION FILED APR-4, l9l3.

Patented Nov. 16, 1915 *Wi lwwmm ISRAEL KORETZKY. or new YORK,- i r. 2.,nss1suon T L. 'J. ivronms'oiv, or NEW YORK, N. Y.

DRY BATTERY.

Specification of Letters Patent.

Patented Nov. 16, 1915.

Application filed April 4, 1913. Serial 110.758 .815.

To all whom it may concern:

Be it known that I. ISRAEL KORETZKY, a

subject of the Czar of Russia, and a resident.

of New York, State of New York, have invented certain new and useful lmprovements in Dry Batteries, of which the following is a full, (dc-=1, and exact specification.

This inventio" relates to improvements in dry bQttGI'ltr. particularly to that class.

of batteries which are especially adapted for use with flash-lights and electrical novelties or the like.

It is the object of the invention to reproduce a battery which shall have. a longer life both in service and on the shelf, and

which shall produce a much stronger light than the small dry batteries which are being produced at the present time. With this end in view I use in the construction of my improved battery recovered manganese, z. c.

a chemically preci itated manganese, produced as a by-pro uct in the manufacture of chlorid of lime and other chemical industries.

A practical embodiment of theinvention is represented in the accompanying drawing, formingpart of this specification, in which similar characters of reference indicate corresponding parts'in all the views, the said invention being more fully described hereinafter and then pointed out in the appended claims.

In the drawing: Figure l is a vertical longitudinal section of my improved dry battery, and Fig. 2 is a horizontal section through the same.

Each dry cell as shown includes a Zinc cup 10 which is preferably but not necessarily circular in cross section. lVithin thecup is a bag 11 secured to the cup by a paste 12 cap 15 or the like. The bag is securely tied to the carbon and parafiin 1(') is poured into the casing from the top. whereafter a small piece ofpaste-board 17 is placed on top and the top is then sealed with a wax 18 of any well known and suitable kind.

The recovered or precipitated manganese 13, contained in bag 11, is the result of the following process, to wit: Amid, with a certain quantity of soda lye added, is stirred for a certain length of time and heated to a temperature of 35 degree Celsius, when a given quantity of permanganate of potash is added and through cooling pipes the temperature is kept down to 35 degrees Celsius. Following a stirring process of this mixture f r a period of 24 hours, a certam quantity of sulfuric acid of a strength of 35 degrees Baum is added and then the solution is heated to] 45 degrees Celsius.

Then this mixture is drawn off into pressure -tanks and thenv driven by air pressure through a .set of filter presses where the manganese then is recovered or .separated. The recovered manganese is then carefully washed out for not less than l hours with pure clean water to remove all alkalis, when the recovered manganese is taken out of the presses into the drying room and dried at a temperature of not to exceed degrees Celsius, after drying the recovered or precipitated manganese is then ready to be used in the manufacture of bat tery cells. -The substance resulting from the foregoing process is known chemically in the trade and art as recovered manganese and as such is a well-known com-. modity of commerce. It is in color from blue to bluish black. It is chemically pure,

soluble in muriat-ic acid, and partly soluble in sulfuric and nitric acid. Actual tests of this particular product show that recovered manganese is an entirely different product from the socalled pyrolusite, as it differs in its analysis and its physical and chemical. properties, and action; that pyrolusite has 'a specific gravity of between -l and 5, ac-

cording to purity and that recovered manganese varies in specific gravity from 1.8 to 2.2 according to the care used in its preparation; and that recovered manganese much more readily soluble in acids than the ordinary pyrolusite. This recover-mi manganese is not What might ordinarily termed a homogeneous chemical product,; and a number of chemical analyses have. shown the presence of the following chemi;

'cal compounds, viz, MnO M11 0 M11 0} and other manganese salts in small quantities, besides traces of caustics and insoluble matters.

It is "understoodthat changes maybe made inthe form and dimensions of the dry battery or in the proportions of the parts 1 constituting-the same or in its material, and

the proportions of mixture, without departing fror'n'th'e scope and purpose of the invention, therefore I do .not wish to be lim;

ited to the particular form of dry battery herein described and shown.

cl'aimz" W ,1. In aigalvaniccell comprising posit iyp Havig thus described my invention, I"

and-negative elements, a-dep'olanzing mass 20 with a very pure carbon, moistened with an 25 electrolyte and pressed into shape.

. In testimony whereof I aflix my signature in presence of two witnesses.

ISRAEL KORETZKY. Witnesses:

L. J. MORRISON, FLORENCE GREEK. 

